IBM 847651U Handbook - Page 194

Diagnostic tools overview See "Running the diagnostic test programs" on page 164 for information on running the diagnostic programs that come with your server. Power-on self-test (POST) When you turn on the server, it performs a series of tests to check the operation of server components and some options. This series of tests is called the power-on self-test, or POST. POST does the following: Checks the operation of some basic system-board operations Checks the memory operation Compares the current server configuration with the stored server configuration information Configures PCI adapters Starts the video operation Verifies that the drives (such as the diskette, CD-ROM, and hard disk drives) are connected properly If Power-On Self-Test is set to [Enhanced], numbers that show the amount of memory being tested appear in the top-left corner of the screen until the total amount of memory in the system is reached. Options for running a quick POST or accessing the Configuration/Setup Utility program appear in the lower-left corner of the screen. Quick mode is the default mode of operation. To change the mode to [Enhanced], select Start Options from the Configuration/Setup Utility program menu and follow the prompts on the screen. Note: The amount of available memory shown might be somewhat less than expected because of BIOS shadowing in RAM. If POST finishes without detecting any problems, the first screen of your operating system or application program appears (if you have not set a power-on password). If you have set a power-on password, a password prompt appears. You must enter your password before the first screen of your operating system or application program will appear. (For further information on using passwords, see "System Security" on page 43.) 160 Netfinity 3000 User's Handbook